Function set_to_string

sql/strfunc.cc:353–382

char *set_to_string(THD *thd, LEX_STRING *result, ulonglong set,
                    const char *lib[])
{
  char buff[STRING_BUFFER_USUAL_SIZE*8];
  String tmp(buff, sizeof(buff), &my_charset_latin1);
  LEX_STRING unused;

  if (!result)
    result= &unused;

  tmp.length(0);

  for (uint i= 0; set; i++, set >>= 1)
    if (set & 1) {
      tmp.append(lib[i]);
      tmp.append(',');
    }

  if (tmp.length())
  {
    result->str=    thd->strmake(tmp.ptr(), tmp.length()-1);
    result->length= tmp.length()-1;
  }
  else
  {
    result->str= const_cast<char*>("");
    result->length= 0;
  }
  return result->str;
}

char *flagset_to_string(THD *thd, LEX_STRING *result, ulonglong set,
                        const char *lib[])